Derives the ultimate quantum limit for estimating functions of multiple parameters in general Hamiltonians, showing it reduces to an optimized single-parameter quantum Cramér-Rao bound with an attaining protocol.
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Develops reference-frame-independent nonlinear quantum metrology using local unitary invariants and randomized local measurements on multiple copies, deriving analytical precision scaling for two-body interaction Hamiltonians like one-axis twisting.
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Multiparameter function estimation for general Hamiltonians
Derives the ultimate quantum limit for estimating functions of multiple parameters in general Hamiltonians, showing it reduces to an optimized single-parameter quantum Cramér-Rao bound with an attaining protocol.
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Reference-frame-independent quantum metrology
Develops reference-frame-independent nonlinear quantum metrology using local unitary invariants and randomized local measurements on multiple copies, deriving analytical precision scaling for two-body interaction Hamiltonians like one-axis twisting.